Water-bottle stopper.



H. P. KRAFT & M. 0. SGHWEINERT. WATER BOTTLE STOPPER.

APPLICATION FILED MAR. 12, 1910.

1,097,647, Patented May 26, 1914 INYENTORS:

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unrrnn STATES PATENT OFFICE.

HENRY P. KRAFT, OF NEW YORK, N. Y., AND MAXIMILIAN CHARLES SCHWEINERT, OF WEST HOBOKEN, NEW JERSEY.

WATER-BOTTLE STOPPEB.

To all whom it may concern Be it known that we, HENRY P. KRAFT, residing in the borough of Brooklyn, in the county of Kings, city and State of New York, and MAXIMILIAN CHARLES Senwnmnn'r, residing in West Hoboken, in the county of Hudson and State of New Jersey, citizens of the United States, have invented certain new and useful Improvements in VVater-Bottle Stoppers, of which the following is a specification.

This invention relates to water bottle stoppers and aims to provide certain improvements therein. Stoppers of this kind as heretofore constructed have usually consisted. of a socket member and a stopper proper which is adapted to screw into or upon the socket member, a suitable packing being carried by the one or other of said parts to form a leak-tight joint between the two. In the best devices of this kind the stopper proper is formed of two pieces of sheet-metal, the lower of which is drawn to cup shape and is provided at its upper end with an outwardly extending lateral flange, and the upper of which is formed as a cap or disk, the edge of which is crimped or bent over the flange of the lower member so as to make a tight joint between the two. This construction while providing a strong and durable stopper, has the disadvantage of forming a flange at the top of the stopper which is of considerably greater diameter than the body thereof. This renders the use of such stopper diiiicult in certain forms of water bottle stoppers wherein the stopper proper is designed to screw below the top of the socket member.

According to our present invention we provide a stopper, the body of which is constructed of a plurality of pieces of sheetmetal connected by a joint which is preferably of less diameter than the body of the stopper. in its preferred form such stopper is constructed of a cup-shaped upper portion having its lower edge bent to form an internal shoulder and a flange beneath the latter, and a disk-shaped lower portion clamped against such shoulder by such flange, the joint thus formed being of sufficiently small diameter to avoid interference with the threads of the socket member into which the stopper is screwed.

In the drawings wherein we have illustrated our invention in its preferred form,

Specification of Letters Yatent.

Application filed March 12, 1910.

Patented May 26, 1914-.

Serial No. 548,954.

Figure 1 is a side elevation partly in vertical section of a stopper constructed in accordance with our invention; Fig. 2 is an enlarged vertical section of the lower part of the stopper before the final bending operation; Fig. 3 is a similar section after such operation, and showing the packing washer in place.

Referring to the drawings, let A indicate the stopper as a whole having a body portion B, a handle C and a packing washer D.

It is practically essential that the body 13 of the stopper be formed of sheet-metal, and that the screwthreads a be constructed by bending or crimping the entire thickness of metal constituting the side wall of the body, so as to form in effect an exterior and an interior screw-thread. The body B is best formed of two pieces of sheet-metal, and preferably the upper part b is made cupshaped as shown with its under side open, such under side being closed by a lower member 0. The slight thickness of metal used in constructing the body portion renders it diiiicult to provide a leak-tight joint between the two parts unless the diameter of the joint exceeds that of the screwthreaded portion.

According to our invention we form the lower part 0 preferably as a flat, unllanged disk, and we form the upper portion 6 with an internal shoulder (Z against which the edges of the disk rest, the lower edge of the body portion being bent inwardly over the disk as shown at c to hold the latter in place. It is necessary that the flange e at its portion of greatest diameter f' shall be sufficiently constricted to avoid interference with the screw-threads of the socket member when the stopper is in place therein. Preferably therefore the diameter of the flange at this point is no greater than the diameter of the portion 7) at the bottom of its threads, although the usual looseness of fit between the stopper and its socket member permits some slight variations in these proportions. In any event such diameter should not GX- eeed the greatest diameter of the body.

In constructing the stopper according to our invention, the shoulder (Z is first formed and the disk 0 is then placed in the position shown in Fig. 2, after which the flange is bent over as shown in Fig. 3.

The stopper provided by our invention is of exceptionally cheap and simple construetion. We avoid the necessity of flanging the disk section of the stopper while at the same time making a strong and durable connection between the parts. By locating the disk at the bottom of the stopper it is not subjected to any considerable strain since the torsional strain in screwing and unscrewing is taken up by the screw-threaded portion 6. The connecting jointbetween such screw-threaded portion and the disk 0 is therefore only subjected to the strain due to the frictional contact of the packing washer D as it engages the seat of the socket 'n'ie nber.

By our invention we also gain an important advantage in the appearance of the-stopper. On its exterior it presents a continuous wall without joints or other disfiguring parts, and hence is more easily plated than those now in use. lhe packing washer preferably extends completely across the under face of the stopper and hence conceals the.

lower joint.

Although we have described in detail the preferred form of our invention, we do not wish to be limited thereto as various changes may be made therein without departing from the spirit of our invention.

hat we claim is: r

1. A hollow closed article comprising two sheetmetal sections, one of which is a tubular seamless section, having a closed end and an open end, and the other of which is provided with a flat marginal portion, said tubular section having an open external an-,

nnlar groove near its open end forming an internal shoulder on the interior thereof,

having a closed end and an open end, and

the other of which is provided with a fiat marginal portion, said tubular section having an open external annular groove near its open end forming an internal shoulder on the interior thereof, and an Outer edge portion turned down upon said flat marginal portion of said other member and pressing the same against said internal shoulder, said outer edge portion being of less diameter than the diameter of said tubular section between the bottom of the spiral indentation whereby said article is adapted to fit within a screw-threaded socket, said external groove serving for the reception of an abutment in bending said edge portion upon said shoulder and interposed flat marginal portion of said other section.

In witness whereof, we have hereunto signed our names in the presence of two subscribing witnesses.

HENRY P. KRAFT. 'MAXIiiIlLIAN CHARLES SGHWEINERT.

Witnesses EUGENE V. halrnns, FRED WIIrrE.

Copies of this patent may be'obtain'ed for five cents each, 'byaddressing the Commissioner r01 Patents,

Washington, I). 0. 

